<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script src="../js/jquery-3.4.1.min.js"></script>
		<script>
			//$();
			//$(function(){});//
			//$(function(){
				
			//});//
			$(function(){
				alert("welcome to jquery");
				$("div").html("This is a div");
				$("div").css("border","40px outset red").css("border-radius","20px");
			});
		</script>
	</head>
	<body>
		<div></div>
		<div></div>
		<div></div>
	</body>
</html>
